…I’m just saying. Making a modern engine from scratch is hard. There are just too many things to worry about. And the record of “RPG studios rolling a new in house engine” is not great.

Larian’s track record is good. They used an in-house engine for Divinity: Original Sin, Divinity: Original Sin 2, and Baldur’s Gate 3. And Vincke attributes at least part of their success to using in-house tools instead of “off the shelf” engines.